Teaching and learning about force with a representational focus : pedagogy and teacher change

A large body of research in the conceptual change tradition has shown the difficulty of learning fundamental science concepts, yet conceptual change schemes have failed to convincingly demonstrate improvements in supporting significant student learning. Recent work in cognitive science has challenged this purely conceptual view of learning, emphasising the role of language, and the importance of personal and contextual aspects of understanding science. The research described in this paper is designed around the notion that learning involves the recognition and development of students’ representational resources. In particular, we argue that conceptual difficulties with the concept of force are fundamentally representational in nature. This paper describes a classroom sequence in force that focuses on representations and their negotiation, and reports on the effectiveness of this perspective in guiding teaching, and in providing insight into student learning. Classroom sequences involving three teachers were videotaped using a combined focus on the teacher and groups of students. Video analysis software was used to capture the variety of representations used, and sequences of representational negotiation. Stimulated recall interviews were conducted with teachers and students. The paper reports on the nature of the pedagogies developed as part of this representational focus, its effectiveness in supporting student learning, and on the pedagogical and epistemological challenges negotiated by teachers in implementing this approach.

Beyond the separation of powers : judicial review and the regulatory proscription of terrorist organisations

Administrative law remains the key defence against an over-zealous executive arm of government, but administrative law needs to be understood in an international context. Perhaps nowhere is this more apparent than in relation to legislation designed to counter terrorist activities. The co-ordination of terrorist activities knows no borders, and state-centered executive action designed to address the threat of terrorism necessarily operates in a broader global environment. An important but controversial part of Australia's counter-terrorism legislation suite is the power to proscribe terrorist organisations. The authors contend that the scope of judicial review available in relation to decisions of the Commonwealth executive to proscribe terrorist organisations is inadequate and may jeapordise Australia's compliance with international standards, such as those provided in the International Covenant on Civil and Political Rights. Now is an opportune time to reassess the structure and operation of the power to proscribe organisations in Australia.

Statutory verification of water rights: the 'insuperable' difficulties of propertising water entitlements

The abolition of riparian entitlements in the early stages of colonial Australia and the vesting of these rights in the Crown represented a turning point for the evolution of private water rights. The extinguishment of common law rights connected to vested land interests and the introduction of new, unaligned statutory entitlements provided a new and fundamentally different system for the creation and regulation of private water entitlements. Unlike riparian entitlements, in the absence of express definition, statutory water entitlements may only be verified as property where such a construction is consistent with the nature and scope of the entitlement. In this respect, the statutory framework has disaggregated the propertisation of water rights from land ownership and linked the process to broader statutory interpretation principles. The shift away from institutional property has generated concerns about the interpretive approaches appropriate for the verification of legislative water entitlements. This article examines the existing interpretive approaches and argues that the blurring of the propertisation process with the separate issue of whether any change or modification of such water rights attracts s 51(xxxi) of the Commonwealth Constitution has produced a situation where core property indicia is increasingly overshadowed by legislative defeasibility. In the recent High Court decision of ICM Agriculture Pty Ltd v Commonwealth, the focus of the majority judgements upon the inherent susceptibility of legislative entitlements to variation or extinguishment acted as a catalyst for the non-propertisation of statutory bore water licences in New South Wales. The emphasis the majority judgements gave to legislative defeasibility precluded a full and balanced assessment of other highly relevant property indicia, in particular the expectation interests of the holders. Conflating property and constitutional evaluation in this way is inappropriate in an era where entitlements to natural resource interests are increasingly statute based and the verification process has significant social and economic repercussions. Determining whether a statutory entitlement constitutes property requires a careful balancing of legislative intent, social and environmental context and individual expectation and the vicissitudes of a regulatory context should not eclipse this process.

Regulatory challenges in the move to a low-carbon environment

An outcome of the international climate conference in Copenhagen (COP 15, 2009) was that a number of governments have undertaken to reduce their nations' greenhouse gas (GHG) emissions and some have provided targets and deadlines for the achievement of their stated goals. While the transition to a low-carbon environment has the potential to stimulate growth, create jobs and opportunities, and to bring benefits to the economy, there are many challenges in the process. This is an exploratory paper aimed at identifying the major regulatory and governance issues associated with the move to a low-carbon environment. In terms of business governance, CEOs and other executives responsible for corporate oversight will need to monitor, assess, and manage compliance with climate change and carbon-related regulation. In the transition period government regulation encouraging appropriate carbon costs classification and measurement, financial sustainability reporting and disclosure, and responsible carbon citizenship are expected to be predominant.

Outsourcing of core business functions : focus on the accounting profession

This study found that a majority of Australian accounting firms either currently oursource accounting services or are considering outsourcing, and identified the significance of outsourcing contracts. It established that most firms outsource their core services. The study provided important information regarding ethical issues and the relinquishment of professional status.

Water and ion channels : crucial in the initiation and progression of apoptosis in central nervous system?

Programmed cell death (PCD), is a highly regulated and sophisticated cellular mechanism that commits cell to isolated death fate. PCD has been implicated in the pathogenesis of numerous neurodegenerative disorders. Countless molecular events underlie this phenomenon, with each playing a crucial role in death commitment. A precedent event, apoptotic volume decrease (AVD), is ubiquitously observed in various forms of PCD induced by different cellular insults. Under physiological conditions, cells when subjected to osmotic fluctuations will undergo regulatory volume increase/decrease (RVI/RVD) to achieve homeostatic balance with neurons in the brain being additionally protected by the blood-brain-barrier. However, during AVD following apoptotic trigger, cell undergoes anistonic shrinkage that involves the loss of water and ions, particularly monovalent ions e.g. K+, Na+ and Cl-. It is worthwhile to concentrate on the molecular implications underlying the loss of these cellular components which posed to be significant and crucial in the successful propagation of the apoptotic signals. Microarray and real-time PCR analyses demonstrated several ion and water channel genes are regulated upon the onset of lactacystin (a proteosomal inhibitor)-mediated apoptosis. A time course study revealed that gene expressions of water and ion channels are being modulated just prior to apoptosis, some of which are aquaporin 4 and 9, potassium channels and chloride channels. In this review, we shall looked into the molecular protein machineries involved in the execution of AVD in the central nervous system (CNS), and focus on the significance of movements of each cellular component in affecting PCD commitment, thus provide some pharmacological advantages in the global apoptotic cell death.

Tax planning, avoidance and evasion in Australia 1970-2010 : the regulatory responses and taxpayer compliance

This article examines tax avoidance strategies used by Australian taxpayers over the last four decades and analyses the regulatory responses by the government, noting a move away from the ‘command-and-control’ approach of the 1980s towards one of ‘responsive regulation’ and ‘meta risk management’. It is argued that despite inherent complexity issues, this regulatory approach has nevertheless contributed to the fostering of trust and a perception of fairness in the Australian tax system.

Regulatory design strategies and enforcement approaches for research involving human embryos and cloning in Australia and the United Kingdom – time for a change.

This paper examines regulatory design strategies and enforcement approaches in the context of the UK and Australia’s regulation of research involving human embryos and cloning. The aim is to discuss current regulation in view of the impending review of the Research Involving Human Embryos Act 2002 (Cth) and the Prohibition of Human Reproductive Cloning Act 2002 (Cth). It is argued that the type of regulation used in relation to those who are licensed to research in Australia is unsuitable due to an over-emphasis on deterrence and the authoritarian approach taken by regulatory bureaucracies. The cost and efficiency of the current system is also questioned. The central thesis is that a co-regulatory system that combines the existing framework legislation with self-regulation should be adopted for licence holders. Such regulation of licence holders should include responsive regulatory strategies. ‘Command and control’ design strategies and deterrence approaches present in the current regulatory systems for breaches of legislation by non-licence holders and serious breaches by licence holders should be maintained.